Extensions are like apps for Firefox.

They add features to Firefox to make browsing faster, safer, or just plain fun.

Recommended extensions
  • Dark Reader

    Dark Reader

    Dark mode for every website. Take care of your eyes, use dark theme for night and daily browsing.

    521,477 users

  • Privacy Badger

    Privacy Badger

    Automatically learns to block invisible trackers.

    949,941 users

  • Privacy Possum

    Privacy Possum

    Privacy Possum monkey wrenches common commercial tracking methods by reducing and falsifying the data gathered by tracking companies.

    97,224 users

  • Google Search Fixer

    Google Search Fixer

    Override the user-agent string presented to Google Search pages to receive the search experience shown to Chrome.

    24,275 users

  • NoScript Security Suite

    NoScript Security Suite

    The best security you can get in a web browser! Allow potentially malicious web content to run only from sites you trust. Protect yourself against XSS other web security exploits.

    409,954 users

  • HTTPS Everywhere

    HTTPS Everywhere

    Encrypt the web! HTTPS Everywhere is a Firefox extension to protect your communications by enabling HTTPS encryption automatically on sites that are known to support it, even when you type URLs or follow links that omit the https: prefix.

    734,421 users

  • Search by Image

    Search by Image

    A powerful reverse image search tool, with support for various search engines, such as Google, Bing, Yandex, Baidu and TinEye.

    148,830 users

  • uBlock Origin

    uBlock Origin

    Finally, an efficient wide-spectrum content blocker. Easy on CPU and memory.

    4,885,561 users

  • Video Background Play Fix

    Video Background Play Fix

    Some sites may not work with Firefox for Android video background play feature. This add-on provides a quick fix by blocking the Page Visibility API and the Fullscreen API.

    42,795 users

  • YouTube High Definition

    YouTube High Definition

    YouTube High Definition is a powerful tool that automatically plays all YouTube videos in HD, changes video player size, offers auto-stop and mute, and much more.

    128,201 users